Tailoring the high-brightness “warm” white light emission of two-dimensional perovskite crystalsviaa pressure-inhibited nonradiative transition

Abstract

Efficient warm white-light emission is an urgently ideal characteristic of single-component materials for light-emitting applications. Although two-dimension hybrid perovskites are promising candidates for light-emitting diodes, as it possesses broadband self-trapped...

A 0D hybrid lead-free halide with near-unity photoluminescence quantum yield toward multifunctional optoelectronic applications

“…Similar to previously reported work, the broadband emission with a large Stokes shift, wide FWHM and long lifetime should originate from the radiative recombination of STEs due to the strong electron–phonon (EP) coupling effect in the deformable 0D soft crystal lattice. 28,29…”

“…The soft crystal lattice readily vibrates with photo-induced excitons as strong electron–phonon coupling, resulting in largely Stokes-shifted broadband light emission. 28,29 As a consequence, these 0D hybrid metal halides can be utilized as down-conversion single-component white light phosphors to fabricate LEDs such as (HMTA) 4 PbMn 0.69 Sn 0.31 Br 8 , [Bmim] 2 SbCl 5 , etc. 30,31 More significantly, some 0D hybrid metal halides have been further explored as X-ray scintillators with impressive light yield under X-ray excitation due to high PLQY and large Stokes shift.…”

Full‐Color Luminescence from Single‐Component Hydrocarbon Crystal: RGB Emission by Altering Molecular Packing Under Pressure

“…[ 24 ] Above 14.2 GPa, non‐radiative decay channel dominates, causing a quenching of the emission intensity. [ 25 ] Further studies are required to clarify the mechanisms of the PIEE observed in coronene. The fit results obtained at each pressure are summarized in Table S4 (Supporting Information).…”

Supramolecular Dimer as High-Performance pH Probe: Study on the Fluorescence Properties of Halogenated Ligands in Rigid Schiff Base Complex

“…We then calculated the radiative decay rate constants (k r ) and non-radiative decay rate constants (k nr ) for the three Schiff base complexes using quantum yields and fluorescence lifetimes (Table 1) [36]. It can be seen that as the pH increased from 5.0 to 7.0, the k r values of Zn-3,5-Cl-saldmpn and Zn-3,5-Br-saldmpn both increased, while the k nr values decreased, which implied that the transmission efficiency of the emitted light was enhanced because the energy of the excitation light was more easily dispersed into radiative energy [37]. It should be noted that under the same pH conditions, the k nr value of Zn-3,5-Br-saldmpn was much larger than that of Zn-3,5-Cl-saldmpn, which may have been caused by the heavy atom effect [38].…”